Why doesnt your xbox 360 cable go into the internet port

I am assuming the "internet port" you are talking about is the phone jack in the wall of your house? If that is the case, the ethernet cable that comes with your 360 needs to plug into your modem or router which in turn plugs into your "internet port" in the wall of your house. So essentially it goes: wall-mounted phone jack> internet modem or router (most modems come with wireless routers built in)> XBOX 360. Hope this helps.